Wire-fastening



(No Model.)

C. F. ERB.

WIRE FASTENING.

Patented Mar. '21, 1893.

Tm: News zum cu. wunrauma, msmnmo, n, c.

UNITED STATES PATENT OFFICE.

CHARLES F. ERB, OF NEW YORK, N. Y., ASSIGNOR TO THE R. E. DIETZ GOM' PANY, OF SAME PLACE, AND THE STEAM GAUGE AND LANTERN OOM- PANY, OF SYRAOUSE, NEW YORK.

wmE-FAsTENmG.

SPECIFICATION forming part. of Letters Patent No. 493,916, dated March 21,1893.

Application filed August 22, 1890. Serial No. 362,722. (No model.)

To all whom it may concern.-

Be it known that I, CHARLES FREDERICK ERB, a citizen of the United States, residing at New York, in the county and State of New York, have invented a new and useful lmprovement in Wire-Fastenings, of which the following is a specification.

This invention relates to the means of fastening wires to plates of tin or other sheet lo metal and has the object to dispense with solder as a means of fastening.

My invention is particularly designed to be Y used in lanterns in which solder joints which are exposed to heat, are liable to become un- I 5 fastened, and is particularly desirable for fastening the globe spring to the air gathering plate or bell of a tubular lantern. These globe springs have been usually secured to the bell by providing the bell for each wire zo with a pair of perforations, bending the perforated portions out of the plane of the bell, inserting the end portion of the wire in both perforations and then securing it in position by soldering, as for instance in the patent to Betts, No. 397,624, dated February 12, 1889.

The security of this fastening depends entirely upon the solder and that is liable to give way under the heat to which it is exposed.

In the accompanying drawingsz-Figure l. is an elevation of a tubular lantern in which myimproved fasteningis used for connecting the globe spring to the bell or air gathering plate above the globe. Fig. 2 is a horizontal 3 5 section in line r1-x, Fig. 1. Figs. Sand 4. are

. vertical sections of the bell on an enlarged scale, showing it in successive stages of preparaton for the reception of the globe spring. Figs. 5 and 6 are fragmentary plan views cor- 4o responding respectively with Figs. 3 and 4.. Fig. 7 is a vertical section of the bell and globe spring showing the fastening completed. gig. S is a vertical cross section in line g/-g/,

Like letters of reference refer to like parts in the several iigures.

A represents the bell or air gathering plate of a tubular lantern. This bell surmounts the globe Bin the usual way and carries the globe 5o spring C which bears against the top of the globe. The globe spring is bent to the usual circular form of a single piece of spring wire with an upwardly projecting thumb piece d at one side and two upwardly turned ends ee diametrically opposite. These ends are fastened to the bell A but instead of being secured by soldering, as has been done heretofore, they are secured as followsz-The bell is iirst provided with twoholes ff foreach end of the wire, the hole f being nearer the center of the bell than the hole f', as represented in Figs. 3 and 5. The metal between the two holes ff is next depressed by means of suitable dies, as represented in Figs. e1. and 6, so as to form a depressed channel or trough on the underside of the bell, which channel or trough is open at its inner and outer ends. The two ends e e of the globe spring are next inserted into these channels, as represented by dotted lines in Fig. 4, in which position each wire is held between the depressed metal of the channel on one side and the bell on the other side. The wires are finally secured in this position by upsetting,indenting or bending the depressed channel portion of the tin and the wire resting thereon by suitable dies outwardly, or into the open space between the two perforations through which the wire passes, as represented in Figs. 1, 2, 7 and 8. This converts the depressed channel portion of the metal into a convex bearing surface which projects outwardly into the concavity of the bent portion of the wire, so that both the convex bearing surface between the two perforations and the bent portion of the wire project outwardly into the recess or open space between the two perforations. By this means the inner concave side of the wire is interlocked with the outer convex bearing surface between the two perforations and the outer convex side of the wire isinterlocked between the two perforations, whereby the wire is firmly secured in position on the plate.

The iinal upsetting dies are preferably so constructed that both wires and channels are upset or bent at the same time. This method of fastening the wire to the tinplate is very simple and inexpensive and does away with the use of solder, whereby the cost of the fas tening is reduced and the latter is rendered ICO more durable as it is not affected by heat. It also enables the globe springs to be secured to the bell to a gage so that each spring stands in the proper position to engage with the globe, While the soldered springs are liable to be pushed in too far or not far enough which re- The combination with the sheet metal plate having a pair of openings and the metal between these openings depressed below the plane of the plate to form a recess between said openings, of a wire arranged against the under side of the plate and passing through said openings and above the depressed portion of the plate, the metal between the openings and the portion of the wire resting on said metal, being bent upwardly into said recess, Whereby a bulge is formed in the metal between said openings having an upper conveX side against which the concave underside of the bent portion of the wire rests, substantially as set forth.

Witness my hand this 19th dayof August,

CHAS. F. ERB.

Witnesses:

I. J. ALLEN, J. F. I-IEANEY. 

